astrazeneca may be able to help. [ coughing ] [ crying ] sorry. [ male announcer ] new robitussin dm max nighttime. fast, powerful cough relief that helps you sleep like a baby. robitussin nighttime. don't suffer the coughequences. experiment has beennder way in america. in the last ten years there has been a huge 74 percent rise in young women donating their eggs so that strangers can have babies and a lot of them were recruited because they're well educated or because of the way they look. so we decided to look mor deeply into this exploding trend. do we really know the consequences? "nightline" co anchor cynthia mcfadden investigates. >> we know how healthy donor eggs can be. $5,000, $10,000 says this ad. if you are a model, $50,000. >> does it make you nervous? >> at this point it's my 6th time. i don't really get nervous anymore. >> reporter: 29-year-old anna cain is a freelance writer who says she's made over $60,000 as a donor. >> as far as you're concerned there is no reason not to do this? >> no. >> reporter: today is egg retrieval day, the culmination of weeks of hormone inject